Ni5Yb: enthalpy of formation
9 accepted literature formation-enthalpy value(s) (experimental 3, model 4, DFT 2); experimental median -21.45 kJ/mol-atom (n = 2); OQMD -21.239 kJ/mol-atom (oqmd-17858).
Systems: Ni–Yb
Literature values
| Value | Phase as printed | T (K) | Class | Method | System | Source | Location | Quote |
|---|---|---|---|---|---|---|---|---|
| -22 kJ/mol-atom | Ni5Yb | 298.15 | experimental | Calorimetry | Ni–Yb | [1] Kardellass 2016 cites Berezutskii 2014 doi | Table 2, p. 5, row 10 report | |
| -20.9 kJ/mol-atom ± 4.4 | Ni5Yb | 298.15 | experimental | Vapor pressure | Ni–Yb | [1] Kardellass 2016 cites Brutti 2002 doi | Table 2, p. 5, row 8 report | |
| -20.9 unknown ± 4.4 | YbNi5 | 298.15 | experimental | XRD, KE method | Ni–Yb | [2] Hu 2017 cites Buschow 1972 doi | Table 3, p. 26, row 13 report | |
| -20.47 kJ/mol-atom | Ni5Yb | 298.15 | model | Optimization | Ni–Yb | [1] Kardellass 2016 | Table 2, p. 5, row 9 report | |
| -20.47 kJ/mol-atom | Ni5Yb | 298.15 | model | Optimization | Ni–Yb | [1] Kardellass 2016 | Table 4, p. 7, row 4 report | |
| -20.2 kJ/mol-atom | Ni5Yb | 298.15 | model | Prediction | Ni–Yb | [1] Kardellass 2016 cites De 1988 | Table 2, p. 5, row 6 report | |
| -16.4 kJ/mol-atom | Ni5Yb | 298.15 | model | Calculation | Ni–Yb | [1] Kardellass 2016 cites Bayanov 1973 | Table 2, p. 5, row 7 report | |
| -20.9 kJ/mol-atom | YbNi5 | 0 | DFT | FP PBE | Ni–Yb | [2] Hu 2017 | Table 3, p. 26, row 16 report | |
| -20.9 unknown | YbNi5 | 0 | DFT | FP PBE | Ni–Yb | [2] Hu 2017 | Table 3, p. 26, row 16 report |
Uncertainty budget
Components kept separate, in the value's unit (literature SCHEMA.md, UNCERTAINTY_CALIBRATION.md): effective = max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter). The method floor is the robust between-study scatter of the method class in ORCHID (calibrated) or a documented prior; printed values and printed uncertainties are unchanged.
| Value | Unit | Printed | Reading | Method (class, basis) | Composition | Scatter | Conversion | Effective |
|---|---|---|---|---|---|---|---|---|
| -22 | kJ/mol-atom | 0.05 | 3.2 (solution_reaction_calorimetry, calibrated) | 3.2 | ||||
| -20.9 | kJ/mol-atom | 4.4 | 0.05 | 4.2 (kems_vapour, calibrated) | 4.4 | |||
| -20.9 | unknown | 4.4 | 0.05 | unit 'unknown' not convertible to kJ/mol-atom | 4.4 | |||
| -20.47 | kJ/mol-atom | 0.005 | 3.9 (model_calculated, calibrated) | 3.9 | ||||
| -20.47 | kJ/mol-atom | 0.005 | 3.9 (model_calculated, calibrated) | 3.9 | ||||
| -20.2 | kJ/mol-atom | 0.05 | 3.9 (model_calculated, calibrated) | 3.9 | ||||
| -16.4 | kJ/mol-atom | 0.05 | 3.9 (model_calculated, calibrated) | 3.9 | ||||
| -20.9 | kJ/mol-atom | 0.05 | 3.929 (dft, calibrated) | 3.929 | ||||
| -20.9 | unknown | 0.05 | unit 'unknown' not convertible to kJ/mol-atom | unit 'unknown' not convertible to kJ/mol-atom |
DFT formation energies
Lowest-energy entries at this composition. Materials Project and OQMD use different energy references and are never averaged. 1 eV/atom = 96.485 kJ/mol-atom.
| Source | Entry | kJ/mol-atom | eV/atom | Space group | E above hull (kJ/mol-atom) | E above hull (eV/atom) | Theoretical |
|---|---|---|---|---|---|---|---|
| OQMD | oqmd-17858 | -21.239 | -0.220131 | P6/mmm | 0 | 0 | no |
DFT sources: A. Jain et al., Commentary: The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002. doi:10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501-1509; S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010. doi:10.1007/s11837-013-0755-4 (CC BY 4.0);
Sources
- Saïd Kardellass, Colette Servant, Najim Selhaoui, Thermodynamic description of the Ni–Yb and Ni–Eu binary systems, J Therm Anal Calorim 125, 255-269 (2016). doi:10.1007/s10973-016-5380-3
- Yong-Jie Hu, Yi Wang, Samad A. Firdosy, Kurt E. Star, Jean-Pierre Fleurial, Vilupanur A. Ravi et al., First-principles calculations and thermodynamic modeling of the Yb-Ni binary system, Calphad 59, 207-217 (2017). doi:10.1016/j.calphad.2017.09.004